I've had a long-standing rule to avoid getting involved in any sort of crowdfunded activities. I didn't donate to Shadowrun or Wasteland, but I did buy and enjoy both of them (I'm plugging both of those games right now, just so you know they're good). I haven't...
Corral the zombies, then shoot them when they're in a big group.
There are jumps in some of the arenas, but it's usually best to keep your wheels on the ground.
Obstacles will flash red if they're about to pop out of the arena floor.